title: Echinostoma friedi: the effect of age of adult worms on the infectivity of miracidia.
mesh_terms: D000375:Aging; D000818:Animals; D006224:Cricetinae; D004449:Echinostoma / Q000502:physiology*; D004451:Echinostomiasis / Q000635:transmission*; D004531:Eggs; D006790:Host-Parasite Interactions; D008195:Lymnaea / Q000469:parasitology; D008647:Mesocricetus / Q000469:parasitology